PET is generally milky white translucent or colorless and transparent, with a relative density of 1.38, a light transmittance of 90%, and a water absorption rate of about 0.6%.
Mechanical properties: high tensile strength, excellent fatigue resistance, good wear resistance.
Thermal performance: poor heat resistance, softening at 70°C, brittleness temperature of -70°C, and toughness at -30°C.
Environmental performance: PET contains ester bond, which is not resistant to water, acid and alkali under high temperature and water vapor conditions. PET is stable to organic solutions such as acetone, benzene, toluene, trichloroethane, carbon tetraammine and oils. PET has excellent weather resistance and can be stored outdoors for a long time.